Specifications

Note: The Power Mac G5’s build-to-order NVIDIA GeForce 6800 Ultra DDL graphics card occupies

both the AGP slot and the adjacent PCI slot. As a result, you can install PCI expansion cards in the

slots labeled 3 and 4 but not in slot 2. To learn more about installing PCI cards, refer to in the Power

Mac G5 Users Guide that came with your computer.

The expansion slots accept PCI or PCI-X cards with either 32-bit or 64-bit address and data buses. The expansion

slots support universal and +3.3 V cards, but not 5 V signalling. The cards are required to use the standard PCI

fence described in the specification.

Note: 5 V keyed or signalling cards do not work in the Power Mac G5 computer.

The expansion slots support all the required PCI signals and certain optional PCI signals. The PCI slots support

the optional 64-bit bus extension signals and cache support signals.

The PCI slots and the AGP Pro 8x slot carry the 3.3 V_AUX power and PME signals to allow an expansion card

to wake the computer from sleep mode.

A total of 90 W is allocated to the three PCI or PCI-X slots and the AGP Pro slot. Graphics cards that conform

to the AGP 3.0 spec can consume up to 30W. AGP Pro cards may consume more power. AGP Pro cards may

also block adjacent PCI or PCI-X slots, in order to provide thermal relief.

Warning: Before removing or installing PCI expansion cards, shut down the computer and unplug

the AC power cord. The Power Mac G5 computer does not support PCI hot-plugging functionality.

When the computer is powered-on or asleep, a red light on the main logic board is illuminated when

the duct door is removed and power is present.

To install or remove a PCI or PCI-X expansion card: turn off power to the computer, unplug the computer, flip

out the enclosure latch, open the side panel, remove the clear plastic air deflector, and remove the fan units.

Remove the blank PCI fence for the appropriate slot, insert the card in the slot, and screw the card’s fence into

place to secure the card.

In order to use the new PCI or PCI-X card, a driver must be installed. The driver installation procedure is

documented by the manufacturer of the PCI card.

For more information on PCI or PCI-X, visit the worldwide web at

http://www.pci-sig.org

Expansion

PCI or PCI-X Expansion Slots